Hi, well ALL TV's can be controlled from the Buttons ON the actual TV itself, look carefully on the TV, you will find a set of buttons, usually about 7. They should be marked, ON/OFF, CH UP, DOWN, MENU, ENTER/OK/SELECT, VOL UP/DOWN. Now Multiple presses will access differing features on the set, usually after pressing the ON/OFF button, you press the menu button and select your Input, Tuner, external, etc, once set, you Change the channel with the UP/DOWN key, and the Volume with the -,+ Key.
It's all in the user manual in the download link below.
http://www.devicemanuals.com/guide/Television/Sylvania/Sylvania-6420FB-20-TV-User-Guide-TmpJek9UZz.html
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